Initial Inspection and Diagnostic Overview

Self-diagnostic Function

The gauge control module has a self-diagnostic function.
- The beeper drive circuit check
- The indicator drive circuit check
- The LCD segments check
- The gauges drive circuit check (Speedometer, Tachometer, Fuel gauge)
- The communication line check

Entering the self-diagnostic function with the HDS
Using the HDS, select Body Electrical, Functional Test, Self-diagnostic Function, then follow the screen prompts.

Entering the self-diagnostic function without HDS
Before doing the self-diagnostic function, check the No. 8 (10 A) fuse in the under-hood fuse/relay box and the No. 3 (10 A) fuse in the under-dash fuse/relay box.

1. Push and hold the trip/reset button.
2. Turn the lighting switch ON.
3. Turn the ignition switch ON (II).
4. From 2 sec. to less than 5 sec, turn the lighting switch OFF, then ON and OFF again.
5. Within 5 sec, release the trip/reset button, then push and release the button three times repeatedly.

NOTE:
- While in the self-diagnostic mode, the dash lights brightness controller operates normally.
- While in the self-diagnostic mode, the trip/reset button is used to start the Beeper Drive Circuit Test and the Gauge Drive Circuit Check.
- If the vehicle speed exceeds 2 km/h (1.2 mph) or the ignition switch is turned OFF, the self-diagnostic mode ends.






The Beeper Drive Circuit Check
When entering the self-diagnostic mode, the beeper sounds five times.

The Indicator Drive Circuit Check
When entering the self-diagnostic mode, the indicator lights blink.

The following indicators blink:
Seat belt indicator light, Coolant high temperature warning light, Coolant low temperature warning light, Low fuel indicator light, ABS indicator, Malfunction indicator lamp (MIL), Cruise main indicator, Cruise control indicator, Smart maintenance indicator, Charging system indicator, Washer level indicator, TPMS indicator ('08 USA models), Low tire pressure indicator ('08 USA models), A/T gear position indicator (A/T).

Switch Input Check
After the intermittent beeper sounds at the initial stage of self-diagnostic, a beeper sounds continuously while any of the following switch inputs are switched from OFF to ON.

The following switches cause the beeper sounds:
Seat belt buckle switch, Trip/reset switch, Parking brake switch, Cruise main switch, Cruise control switch, Cruise resume switch, Cruise set switch, Door switches, Tailgate latch switch, Driver's door lock switch, Driver's door key cylinder switch.

The LCD Segment Check
When entering the self-diagnostic mode, the odo/trip segments and shift indicator segment blink five times.

The Gauge Drive Circuit Check
When entering the self-diagnostic mode, the speedometer, the tachometer, and the fuel gauge needles sweep from the minimum position to maximum position, then return to the minimum position.

NOTE: After the beeper stops sounding and the gauge needles return to the minimum position, pushing the trip/reset button starts the Beeper Drive Circuit Check (one beep) and the Gauge Drive Circuit Check again.

The check cannot be started again until the gauge needles return to the minimum position.






If a needle fails to sweep or the beeper does not sound, replace the gauge control module.

The Communication Line Check
While in the self-diagnostic mode, the Communication Line Check starts after the LCD Segments Check.

If all segments come on, the communication line is OK. If there is a communication line error, the word "Error 1" will be indicated on the LCD display.






If the communication line error is found, go to system troubleshooting. If the communication line error is not present, check for body DTCs with the HDS.

Ending the self-diagnostic function
Turn the ignition switch OFF.

NOTE: If the vehicle speed exceeds 1.2 mph (2 km/h), the self-diagnostic function ends.